George Lansing "Butch" Seewagen (born June 13, 1946) is a former professional tennis player from the United States.

[1] His father was the tennis coach at St. John’s University and a former player, who played against Don Budge at the 1936 U.S. National Championships.

[1] Seewagen, who turned professional in 1970, played against top seed Rod Laver in the first round at the 1970 Wimbledon Championships.

[2] He defeated both Jimmy Connors and Jan Kodeš during the 1972 Grand Prix tennis season.

[1] During his professional career he was also the head coach at Columbia University, of teams that included Vitas Gerulaitis and Eric Fromm.